Private individual system to evacuate domestic or other waste waters where there is no collecting system of municipal waste water or where the latter is not justified either because it does not affect the environment, or because the cost would be excessive.
All facilities for the collecting and treatment of urban wastewater. These systems are often managed by public authorities or semi-public associations.
Water that has been subjected to wastewater treatment and delivered to a user as recovered wastewater. This is the direct supply of treated effluents to the user. Wastewater discharged into a watercourse and used downstream is not taken into consideration, nor is recycling within industrial sites.
Domestic wastewater from toilets, generated during the evacuation of faeces and urine and which, as a result, contains a high concentration of organic matter and micro-organisms.